Human is evolved from

Who is a social animal?

Water is supplied to the leaves by the ?

What is essential for human beings to live on earth ?

Where do we live?

Animals that share a lot of common features are known as ?

An immense treasure that provides us with everything we need for our survival is ?

In nature, who are the producers?

Where do the birds live in?

That cannot be seen, touched or tasted, what is that?